Contents
- 1 What is tunable filters?
- 2 Which of the tunable filter is most suitable for DWDM?
- 3 What is tunable bandpass filter?
- 4 How do optical filters work?
- 5 How does an AOM work?
- 6 What kind of filter is a tunable filter?
- 7 What kind of filters do Analog Devices use?
- 8 What kind of filters are used in medical devices?
What is tunable filters?
EXFO’s tunable optical filters are wavelength tunable and bandwidth adjustable. They deliver superior performance whatever your application. The use of bulk optics in combination with diffraction gratings leads to high selectivity, low insertion losses and dispersion.
Which of the tunable filter is most suitable for DWDM?
Up to date, the most commonly used tunable filter structures are interferometric such as Fabry-Perot (FP) and Mach-Zehnder (MZ) interferometers[1]. They are usually poor in the performance of passband flatness and the crosstalk, and require robust electronics to stabilize the central wavelength.
What is acousto-optic tunable filter?
Acousto-optic tunable filters (AOTF) are used to rapidly and dynamically select a specific wavelength from a broadband or multi-line laser source. As the applied RF frequency is varied, the transmitted wavelength changes, “tuning” the wavelength of the beam or image in tens of microseconds or less.
What is tunable bandpass filter?
A recent advance in this area has been the development of thin-film interference filters that are tunable over a wide range of wavelengths with little or no sacrifice in filter performance, i.e. transmission characteristics. …
How do optical filters work?
Optical filters selectively transmit light in a particular range of wavelengths, that is, colours, while absorbing the remainder. They can usually pass long wavelengths only (longpass), short wavelengths only (shortpass), or a band of wavelengths, blocking both longer and shorter wavelengths (bandpass).
What is DWDM filter?
Application. Dense wavelength division multiplexing (DWDM) filters multiplex and de-multiplex wavelength signals in high speed optical networks. The DWDM filters are evenly spaced on an ITU grid ranging from 1525 to 1640 nm. Single band filters are used to transmit a single DWDM channel and reflect other DWDM channels.
How does an AOM work?
An acousto-optic modulator (AOM) is a device which can be used for controlling the power of a laser beam with an electrical drive signal. A transducer generates a sound wave, at which a light beam is partially diffracted. The diffraction angle is exaggerated; it is normally only of the order of 1°.
What kind of filter is a tunable filter?
The tunable filter arrangement consists of an off-the-shelf DWDM filter seated on a silicon MEMS device consisting of a square platform and an actuation system composed of an array of thermal actuators, thereby creating a compact hybrid MEMS device.
What is an acousto-optic tunable filter ( AOTF )?
An acousto-optic tunable filter (AOTF) is a kind of optical filter which is based on a kind of acousto-optic modulator . Wavelength tuning is electrically controlled through the applied RF frequencies.
What kind of filters do Analog Devices use?
Tunable Filters. Analog Devices family of tunable filters includes programmable VGA, low-pass harmonic, band-pass, and band-reject portfolios to suit a large range of applications. Our devices offer an ideal filtering solution for communications, instrumentation, defense, medical, and other industries, with a flexible and robust feature set…
What kind of filters are used in medical devices?
Our devices offer an ideal filtering solution for communications, instrumentation, defense, medical, and other industries, with a flexible and robust feature set to meet the stringent demands of multiple designs.